Heat Recycling System for a High-Temperature Exhaust Gas

ABSTRACT

A heat recycling system for a high-temperature exhaust gas contains a body having a combustion space, at least one burning device, and a storing device; characterized in that: the combustion space is connected with an exhaust pipe; the burning device is coupled with a heat recycling blower and a gas control valve; the storing device is secured on a distal end of the exhaust pipe and is comprised of a second control valve, a first store tank, and a second store tank; the second control valve is disposed on the exhaust pipe of the body and includes two output ends which connect with a gas guiding tube and a second guiding tube respectively; the first store tank is coupled with the gas guiding tube and is connected with a first check valve and a second check valve, the gas check valve is coupled with a first gas-exhausting blower.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a heat recycling system for a high-temperature exhaust gas, and more particularly to the high-temperature exhaust gas discharged by the body and recycled its heat energy by a storing device so as to discharge a lower-temperature exhaust gas, after the storing device absorbs the heat energy fully and introduces a combustion gas, the heat recycling system warns a room-temperature gas so that the room-temperature gas is introduced into a combustion space of a body.

2. Description of the Prior Art

Referring to FIG. 1, a conventional burning system contains a body A, a burning unit B and a storing unit C.

The body A includes a combustion space A1 to be a heat exchange area.

The burning unit B is comprised of at least one pair of first machine B1 and second machine B2, and the at least one pair of first machine B1 and second machine B2, are fixed on two sides of the body A individually to be started on and off reciprocately to supply burning fuels (Liquefied Petroleum Gas LPG or Liquefied Natural Gas LNG) to the combustion space A1 of the body A. A power of the at least one pair of first machine B1 and second machine B2, is a fuel calculated by a unit of kg or m³/h in a sufficient burning condition and is a heat output (kw/h or kcal/h).

The storing unit C is disposed on two sides of the body A and is comprised of a first store cylinder C1, a first blower C2, a second store cylinder C3, and a second blower C4, wherein between the first store cylinder C1 and the first machine B1 is defined a first switch valve C5, and the first store cylinder C1 is connected with a first check valve C11, between the second store cylinder C3 and the second machine B2 is defined a second switch valve C6, and the second store cylinder C3 is coupled with a second check valve C31.

When the first machine B1 of the burning unit B is started to supply the burning fuel to the combustion space A1 of the body A, the second machine B2 is turned off and stops a supply of the burning fuels. During an operation of the first machine B1, the second blower C4 of the storing unit C is started so that a heat energy stored by the second store cylinder C3 is supplied to the first machine B1 of the body A via the second machine B2 to be burned, and the first switch valve C5 of the storing unit C is started simultaneously so that the heat energy resulting from the body A is discharged and stored in the first store cylinder C1.

While the second machine B2 of the burning unit B is turned on to supply the burning fuels to the combustion space A1 of the body A, the first machine B1 is turned off and stops the supply of the burning fuels. During an operation of the second machine B2, the first blower C2 of the storing unit C is started so that the heat energy stored by the first store cylinder C1 is supplied to the second machine B2 of the body A to be burned further, and the second switch valve C6 of the storing unit C is turned on so that the heat energy resulting from the body A is discharged and stored in the second store cylinder C3.

The first machine B1 is turned on by controlling the heat energy stored in the first store cylinder C1, and when the heat energy is stored in the first store cylinder C1 fully, the supply of the burning fuels from the first machine B1 to the body A is stopped, while the first machine B1 is turned off by controlling the heat energy stored in the second store cylinder C3, and when the heat energy is stored in the second store cylinder C3 fully, the supply of the burning fuels from the second machine B2 to the body A is stopped.

However, the conventional burning system still has the following defects:

1. If a required heat energy of the body A is N×10 thousand kcal, the heat energy supplied from the machine is 2N×10 thousand kcal to operate the burning system, the burning unit B is comprised of a pair of the first machine B1 and the second machine B2 to turn on and off interactively, thus having high machine purchase cost.

2. The burning system has a burning operation and a storing operation interactively so that the first machine B1 and the second machine B2 are turned on and off interactively to supply the burning fuels (around 2-3 minutes/per turn on-off operation), but such a turned on-off operation will waste the burning fuels during a temperature increasing period of the machine. For example, if the temperature increasing period of the machine is 3 minutes, the burring fuels will be burned more than 5 seconds.

3. The first machine B1 and the second machine B2 are turned on and off interactively to supply the burning fuels, so an extreme heat impacts the machine to lower machine's life.

4. The first machine B1 and the second machine B2 are turned on and off interactively to supply the burning fuels, hence an extreme temperature change happens on the machine, and the first store cylinder C1 and the second store cylinder C3 of the storing unit C have to be fixed close to the body A, accordingly a heat storing area of the body A is limited to have a poor combustion space.

5. A pipeline is applied to introduce the exhaust gas outward and to feed the heat energy, therefore the heat energy is maintained difficultly to cause heat consumption greatly.

6. The related components to flame the burning fuels (LPG or LNG) are used overly to lower a service life easily.

However, such a conventional dental floss brush can not be used to eliminate pieces of a tongue coating of a tongue.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas that is capable of discharging the high-temperature exhaust gas by a body, and after a storing device absorbs a heat energy fully and introduces a combustion gas, the heat recycling system warns a room-temperature gas so that the room-temperature gas is introduced into a combustion space of the body.

Secondary object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas in which only at least one burning device is provided to supply burning fuels constantly, and the storing device is capable of supplying a recycled heat energy resulting from an exhaust gas so that a burning temperature of the combustion space of the body keeps at a high temperature to improve an extreme heat impact on a machine.

Third object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas in which the at least one burning device is capable of providing 2N×10 thousand kcal of heat energy if the body requires N×10 thousand kcal of heat energy so that a burning system is operated well at a lower cost.

Fourth object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas that is capable of enhancing burning fuels effectively to prevent from fuel consumption and is capable of keeping a burning temperature of the combustion space of at the high temperature to save fuel cost.

Fifth object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas that is capable of preventing from the extreme heat impact on a machine to prolong the machine's life.

Another object of the present invention is to provide a heat recycling system for a high-temperature exhaust gas that is capable of preventing from a temperature change so that a first store tank and a second store tank have not to be fixed close to the body, and the second store tank is provided in a large size to increase heat storing and burning efficiency.

A heat recycling system for a high-temperature exhaust gas contains a body having a combustion space, at least one burning device disposed beside the body, and a storing device;

characterized in that:

the combustion space of the body is connected with an exhaust pipe;

the burning device is coupled with a heat recycling blower and a gas control valve;

the storing device is secured on a distal end of the exhaust pipe of the body and is comprised of a second control valve, a first store tank, and a second store tank; the second control valve is disposed on the distal end of the exhaust pipe of the body and includes two output ends which connect with a gas guiding tube and a second guiding tube respectively; the first store tank is coupled with the gas guiding tube and is connected with a first check valve and a second check valve, the gas check valve is coupled with a first gas-exhausting blower, and between the first store tank and the gas control valve is defined a first hose; a second store tank is connected with the second guiding tube and is coupled with a third check valve and a fourth check valve, the fourth check valve connects with a second gas-exhausting blower, between the second store tank and the gas control valve is defined a second hose.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a conventional burning system;

FIG. 2 is a block diagram showing the assembly of a heat recycling system for a high-temperature exhaust gas according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

With reference to FIG. 2, a heat recycling system for a high-temperature exhaust gas according to a preferred embodiment of the present invention comprises: a body 1 having a combustion space 11, at least one burning device 2, and a storing device 3.

The body 1 includes the combustion space 11 connected with an exhaust pipe 111.

The burning device 2 is fixed beside the body 1 to supply burning fuels (Liquefied Petroleum Gas LPG or Liquefied Natural Gas LNG) to the combustion space 11 of the body 1 and is coupled with a heat recycling blower 21, and the heat recycling blower 21 is connected with a gas control valve 22; a power of the burning device 2 is a fuel calculated by a unit of kg or m³/h in a sufficient burning condition and is a heat output (kw/h or kcal/h).

The storing device 3 is secured on a distal end of the exhaust pipe 111 of the body 1 and is comprised of a second control valve 31, a first store tank 32, and a second store tank 33; the second control valve 31 is disposed on the distal end of the exhaust pipe 111 of the body 1 and includes two output ends which connect with a gas guiding tube 311 and a second guiding tube 312 respectively; the first store tank 32 is coupled with an outlet end of the gas guiding tube 311 and is connected with a first check valve 321 and a second check valve 322, an outlet end of the second check valve 322 is coupled with a first gas-exhausting blower 323, and between the first store tank 32 and the gas control valve 22 is defined a first hose 34; the second store tank 33 is connected with the second guiding tube 312 and is coupled with a third check valve 331 and a fourth check valve 332, an outlet end of the fourth check valve 332 connects with a second gas-exhausting blower 333, between the second store tank 33 and the gas control valve 22 is defined a second hose 35.

The body 1 of the heat recycling system discharges the high-temperature exhaust gas, and a heat energy of the high-temperature exhaust gas is recycled by the heat recycling blower 21, and then a low-temperature exhaust gas is discharged; after the first store tank 32 and the second store tank 33 of the storing device 3 absorb a heat completely, a normal combustion gas is introduced via the first check valve 321 and the third check valve 331 so that a room-temperature gas is warmed and introduced into the combustion space 11 of the body 1.

In operation, the burning device 2 is started to supply the burning fuels (LPG or LNG) to the combustion space 11 of the body 1, the high-temperature exhaust gas resulting from burning is discharged from the exhaust pipe 111 of the combustion space 11 to flow into the first store tank 32 via the second control valve 31, and then the first store tank 32 discharges a lower-temperature exhaust gas outward through the second check valve 322 and the first gas-exhausting blower 323. When the first store tank 32 discharges the lower-temperature exhaust gas and stores a heat energy fully, it introduces the normal combustion gas by using the first check valve 321, and a recycled heat energy is introduced into the burning device 2 through the first hose 34, the gas control valve 22, and the heat recycling blower 21, thereby supplying the combustion gas to the combustion space 11.

When the high-temperature exhaust gas flows into the second store tank 33 via the second control valve 31, the second store tank 33 discharges the lower-temperature exhaust gas outward through the fourth check valve 332 and the second gas-exhausting blower 333. After the second store tank 33 discharges the lower-temperature exhaust gas and stores the heat energy fully, it introduces the normal combustion gas via the third check valve 331, and the recycled heat energy is introduced into the burning device 2 via the second hose 35, the gas control valve 22, and the heat recycling blower 21, thus supplying the combustion gas to the combustion space 11.

When the heat recycling system of the present invention is used in an aluminum alloy melting stove, wherein

an operating temperature (flame temperature) of the melting stove is 1,250° C., and a discharging temperature of the exhaust gas is 900° C., after the discharging temperature of the exhaust gas at 900° C. is recycled through the first store tank 32 and the second store tank 33, a discharging temperature of the exhaust gas of the first gas-exhausting blower 323 and the second gas-exhausting blower 333 is 250° C., and a recycling temperature of the first store tank 32 and the second store tank 33 is 650° C. (i.e., 900° C.−250° C.=·650° C.).

The room-temperature gas flows into the burning device 2 and the combustion space 11 of the body 1 through the first check valve 321, the third check valve 331, the first store tank 32, and the second store tank 33 in order, and the heat energy absorbed by the storing device 3 is 575° C., i.e., (900° C.+250° C.)/2=575° C., so the 575° C. is a temperature supplied by the first store tank 32 and the second store tank 33, wherein 30° C. (a room temperature)+575° C.=605° C., so the 605° C. is an gas temperature which flows into the combustion space 11 of the body 1 to flame.

When a conventional melting stove is not equipped with the heat recycling system of the present invention, a required temperature is 1,250° C. (an operating temperature)−30° C. (an inflow temperature/the room temperature) which is equal to 1,220° C.

After the melting stove is equipped with the heat recycling system of the present invention, the required temperature is 1,250° C. (the operating temperature)−605° C. (the inflow temperature/a heat recycle) which is equal to 645° C.

Accordingly, a heat recycle effect of the heat recycling system of the present invention is 645° C.×(100%−35%)=419.25° C. (an estimated heat recycle loss is 35%), 100%−((1,220° C.−419.25° C.)/1,220° C.)=34.36%.

While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

What is claimed is:
 1. A heat recycling system for a high-temperature exhaust gas comprising a body having a combustion space, at least one burning device disposed beside the body, and a storing device; characterized in that: the combustion space of the body is connected with an exhaust pipe; the burning device is coupled with a heat recycling blower and a gas control valve; the storing device is secured on a distal end of the exhaust pipe of the body and is comprised of a second control valve, a first store tank, and a second store tank; the second control valve is disposed on the distal end of the exhaust pipe of the body and includes two output ends which connect with a gas guiding tube and a second guiding tube respectively; the first store tank is coupled with the gas guiding tube and is connected with a first check valve and a second check valve, the gas check valve is coupled with a first gas-exhausting blower, and between the first store tank and the gas control valve is defined a first hose; a second store tank is connected with the second guiding tube and is coupled with a third check valve and a fourth check valve, the fourth check valve connects with a second gas-exhausting blower, between the second store tank and the gas control valve is defined a second hose.
 2. The heat recycling system for the high-temperature exhaust gas as claimed in claim 1, wherein the first check valve and the third check valve are used to introduce a combustion gas into the first store tank and the second store tank respectively.
 3. The heat recycling system for the high-temperature exhaust gas as claimed in claim 1, wherein the second check valve and the fourth check valve are used to supply a low-temperature exhaust gas to the first store tank and the second store tank respectively 